RT Journal Article SR Electronic T1 Non-toxigenic Clostridium difficile to prevent recurrent C. difficile infection JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 67 OP 67 DO 10.1136/ebmed-2015-110234 VO 21 IS 2 A1 Musher, Daniel M A1 Koo, Hoonmo YR 2016 UL http://ebm.bmj.com/content/21/2/67.abstract AB